<template>
  <el-breadcrumb :class="levelList?.length ? 'app-breadcrumb' : ''" separator="/">
    <transition-group name="breadcrumb">
      <el-breadcrumb-item v-for="(item, index) in levelList" :key="item.path">

        <span v-if="(item.redirect === 'noRedirect' || index == levelList.length - 1) && item.meta.title.length < 10"
          class="no-redirect">{{
            item.meta.title
          }}</span>
        <el-tooltip v-else-if="(item.redirect === 'noRedirect' || index == levelList.length - 1) && item.meta.title.length >= 10"
          :content="item.meta.title" placement="top" effect="light">
          <span class="no-redirect">{{
            item.meta.title.substr(0, 10) + "....."
          }}</span>
        </el-tooltip>
        <a v-else-if="item.meta.title=='首页'" @click.prevent="handleLink(item)">首页</a>
        <span v-else class="no-redirect">{{ item.meta.title }}</span>
        <!--                {{item}}-->
      </el-breadcrumb-item>
    </transition-group>
  </el-breadcrumb>
</template>

<script>
import * as pathToRegexp from 'path-to-regexp'
// import router from '@/router/index'
import i18n from '@/lang/index'
const { t } = i18n.global
export default {
  data() {
    return {
      levelList: null
    }
  },
  watch: {
    $route: {
      deep: true,
      immediate: true,
      handler(val) {
        this.getBreadcrumb()
      }
    }
  },
  created() {
    this.getBreadcrumb()
  },
  methods: {
    getBreadcrumb() {
      // only show routes with meta.title
      let matched = this.$route.matched.filter(item => item.meta)
      console.log(matched);
      const first = matched[0]
      if (!this.isDashboard(first)) {
        // 编辑页 二级面包屑
        const breadcrumbs = [{ path: '/home', meta: { title: t('collection.AddDataSet.home') } }]
        for (let i = 0; i < matched.length; i++) {
          const item = matched[i]
          if (item.meta.parent) {
            breadcrumbs.push({ path: item.meta.parent.path, meta: { title: item.meta.parent.title } })
          }
          breadcrumbs.push(item)
        }
        matched = breadcrumbs
      }
      this.levelList = matched.filter(item => item.meta && item.meta.title && item.meta.breadcrumb !== false)
      if (this.levelList[2]?.name == 'home') {
        this.levelList = [this.levelList[0]]
      }
      // let init = false
      // matched.map((item, index) => {
      //   if (item?.meta?.hidden) {
      //     init = true
      //   }
      // })
      // if (init) {
      //   this.levelList = matched.filter(item => item.meta && item.meta.title)
      // } else {
      //   this.levelList = []
      // }

    },
    isDashboard(route) {
      const name = route && route.name
      if (!name) {
        return false
      }
      return name.trim().toLocaleLowerCase() === 'Dashboard'.toLocaleLowerCase()
    },
    pathCompile(path) {
      // To solve this problem https://github.com/PanJiaChen/vue-element-admin/issues/561
      const { params } = this.$route
      var toPath = pathToRegexp.compile(path)
      return toPath(params)
    },
    handleLink(item) {
      const { redirect, path } = item
      if (redirect) {
        this.$router.push(redirect)
        return
      }
      this.$router.push(this.pathCompile(path))
    }
  }
}
</script>

<style lang="scss" scoped>
.app-breadcrumb {
  // display: inline-block;
  // font-size: 14px;
  // line-height: 50px;
  margin-top: 15px;
  margin-left: 15px;

  .no-redirect {
    color: #97a8be;
    cursor: text;
  }
}
</style>
